Paper coating device



Feb- 13f1945 w. F. THIELE ETAL I 2,369,378

-PAPER GOATING DEVICE original Filed May 51, 1939 2 sheets-sheet 1 Feb 13, 1945 w. F. vTHIEME ET AL A 2,369,378

PAPER COTING DEVICE A original Fii'ed May 51, 19:59 2 sheets-Sheet 2 Y se lwill be nerelnnftervmore muy described.

Patented Feb. 13, 194s UNITED STATES PATENT DFFICE 2,369,3'78

PAPER ooArr'NG Davies f William F. Thiele, Wisconsin Rapids, Wis., and

Warren E. Beadle, Sr., deceased, late oi' Wisconsin Rapids, Wis., by Warren E. Beadle, Jr., administrator, Biron, Wis., assignors to Consolidated Water Power and Paper Company, Wisconsin Rapids, Wis., a corporation of Wisconsin Griginal application May 31, 1939, Serial No.

277,460. Divided and this application January 10, 1942, Serial N0. 4256,32()

46 Claims.

This is a division of our zo-pending` application Serial No. 277,460, flled'May 31, 1939, and relates to improvements in apparatus for coating paper formed on the coated surface lafter the coating has once been. applied, t'wo predominant difficulties are encountered. First, the rate of passage of the coating material to thecoating roll is dinicult to control and it is essential that this rate be as uniform as possible; and. secondly, it is diii.

cult'to secure a coating material of uniform fine texture and 'free from lumps continuously passing' to the coating roll.

Vlin our invention, anV apparatus is provided in which the rate of passage of the coatingmaterial to the coating roll can be minutely controlled, and

the coating materialis'so acted upon prior and Y during passage to the coating roll that its texture is maintained uniform. l t i vOther objects and advantages of our invention will be apparent from the accompanying draw- Y ings and following detailed description.

In the drawings, Fig. 1 is a diagrammatlcside elevational view of our coating apparatus. i Fig. 2 is a sidejelevation view illustrating the gate rolls employed inthe apparatus illustrated Fig. 3 is atop planview of the gate rolls illustratedin Fig. 2. Y

Fig'. i is a. fragmentary elevational view of one .of the longitudinally escalating reus in Contact with a coating roll.

Referring. indetail to the'drawings, with particular reference to Fig. 1, a lweb I passes con-v tinuously in the direction of th arrows between lcoating rolls 2 and 3. The rolls 2 and 3 are preferably provided with a surface layer of medium hard rubber or other like semi-resilient material. The rolls 2 and 3 are driven by any `suitable prime ,l mover inotshcwn) at a peripheral speed either .'slightiy'higher or" slightly lower.V or equal tothe .ftranslatoryspeed of the web I. l lperipheral speedof rolls 2 and 3 is slightly greater than the'translatory speed of thepapr web.

yl'iiwlr ormns a and l are disposed adlseent- .roll 2, rolls l and lbei'ng mounted in `sucli a manner as tohave their degree of contlguity adjust- If desired, the nous 4 and s may be made adjustable with respect to the coating roll`2. As will be hereinafter more fully described., rolls l and 5 maybe driven independently and the relative l speeds of said rolls may be changed with respect to each other, or, if desired, said rolls may be geared together to run at the same peripheral speed.

The speed of roll 5 with respect to the coating roll 2V is maintained different. A pair of dams 6 are positioned adjacent the ends of rollsl and 5, said dams functioning as closures at the nip of the rolls. The dams 6 may be constructed of hard rubber or any/material which is frictionless in the presence of the usual coating material. We have found that the material known to the trade as Eel-slip operatesverysuccessfully as closureV -dams when utilized with coating material for the coating' of paper.

A pair of rolls 1 and 8 are disposed-adjacent e eachother and as will be hereinafter more fully described, means is provided whereby the degree of contiguity of said rolls may be controlled. A

transfer roll 9 is interposed betweenrolls 8 and`3, and means is provided whereby rolls 1 and 8 are adjustable with respect to roll 9 so4 as vto control the degree of contiguity between rolls 8 and 9. y

Rolls 'Iv and 8 may be driven independently so that .the peripheral speeds of said rolls may be varied' with respectto each other, or said rolls may be geared togetherV to run at the same peripheral speed. v Roll 9 may be driven at a peripheral speed Yequal to that of roll' 8 and at a speed different from that of roll 3. Dams I0 are carried adjacent theends of rolls 1 and 8 and function in a manner similar to dams 6,

nous u endl: nre positioned adjacent the.

periphery of coating roll 2, said rolls -II and I2 being angularly spaced from eachother -a vdistance of approximately 90% around the periphery of roll 2.

Rolls II and I2 areadapted to make contact y Vwith the surface of roll 2 and are preferably longitudinally or axially reciprocated. Similarly J rolls .I3 and Il are arrangedin like relationship with respect to the coating roll 3. -In the opera- .tion of the device, illustrated in Fig. 1, coating lmaterial is. continuously fed into thel nip of rolls I and! and rolls I and B, and the body of the. cqating'materialis maintained in said nips by I the respective dams-aand III. Bycontri'illing the relative speeds, of roll 5 with respect 'to roll 2, a-

Preferahn the.

predetermined quantity of coating material may be applied tothe surface of roll 2, and'similarly, by controlling the relative peripheral speeds-of rolls 8 and 9 or 9 and 3, a predetermined quantity of coating material may be passed to the surface of the coating roll 3. Obviously all of the various Acontacting rolls may have their peripheral speed varied with respect to each other and a very t minute control of the rate of passage of the coating material to the surface of rolls 2 and 3 is possible. By the provision of axially reciprocating rolls Ii, I2, I3 and I4, the coating material applied to the surface of coating rolls 2 and 3 is smoothed and the films can'ied on said rolls have uniform thicknesses. The web I in passinghe- 1tween the rolls 2 and 3Jpicks up said films on each surface thereof, the lms being laid thereon in their nalform.

Referring particularly to Figs. 2 and 3, a physical embodiment of the gate rolls 4 and 5 or I and 8,-diagrammatically illustrated in 1 is shown. With specic reference to Fig. 2, I5 indicates one side of a supporting frame which may be positioned upon door I5, 'or in the case of rolls 4 and 5, said frame may be supported from a beam positioned above the path of travel of the web i (not shown). There is a frame I5 on each side of the machine vand each frame carries a standard IJ, in the upper portion of which is mounted a bearing 18. A shaft I9 is journalled at each end in opposite bearings I8, said shaft carrying a roll 20. 'I'he roll 2011s provided witha surface layer 2| which is preferably constructed of hard rubber or material `which effectively resists the wearing action of paper coating materials such as-the usual clay dispersions. Y

A standard-22 is pivotally'connected asl at 23 to each of the frames I5, each of said standards carrying a bearing 24 at the upper end thereof. A shaft '25 is journalled at each end in one' of the bearings 24, saidshaft carrying afrol] 26. The roll 25 is provided with a surface layer 2I which is preferably constructed of hard rubber or y material such as the layer 2 I.

Each ofthe standards 22 is provided with an aperture 28 through which a link 29 is adapted to freely pass., One end of each link 29 is pivotally connected to a standard Il at each end of the roll 20 as shown best at 30 in Fig. 2. The

opposite end of each link 29 carries a nut 3I which is threadedly engaged onthe end ofi said' link'and Vserves to confine coil spring 32 between the standard 22 and a washer 33 disposed adjacent nut 3l.

is, similar means is provided for controlling the degree of contiguity of rolls 4 and 5.-

'Referring particularly -to Fig. 3, a motor 39 is directly connected to shaftand a motor 39 is directly connected to shaft I9. A similar arrangement is contemplated in conjunction with rolls 'I and 8 and rolls 4 and V5. By the provision of separate driving means for the rolls 4 and 5 and the rolls 'I and 8. the amount of coating material passed from the'nips of the rolls 4 and I5 'and 1 anda may be controlled by varying the peripheral speeds of, for instance, the roll 4-with respect to the roll 5, or by ,varying the peripheral speed of the roll 'I-with respect to the roll. In addition, by properly adjusting the screws which control the degree of contiguity of the gate rolls, the amount of coating material which is delivered from the nips of the gate rolls may screws 35 are so adjusted ,as to decrease the clearance between the two gate rolls, a lesser amount of coating material will be passed forwardly to the coating rolls 2 and 3.

, -Referring particularly to Fig. 4, a'coating'roli 3 is illustrated .which may correspond to the coating roll 3 or the coating roll 2. A roll I3"v Y is disposed adjacent the surface of roll 3 in a manner contemplated in conjunction with the relationship of rolls II and I2 with respect to the coating roll 2 and th'e,ro11s I3 and I4 lwith respect to the coating roll 3.

The roll 'I3' may be slidably positioned upon a shaft 38 which, in turn, may be rigidly secured at its opposite ends to a frame 39. At one end of the roll i3', a. cam 49 may be positioned, said-cam being rigidly secured toa restricted y portion 4I of the roll I3'. The cam 4I!` is provided with cam slots 42 into which a guide member 43 is adapted to. be positioned. vThe guide A boss 34 is integrally formed upon each bearing 24 and is internally threaded to receive a screw 35having a'hemispherical head 3G.

'I'he arrangement is such that screw 35 may be so adjusted as tol determine the minimum clearwhen standards 22 are urged toward standards I1 by means of springs 32. It can readily be seen thatV the hemispherical heads 39 carried byscrews 35 vabut against bea ings I3 and thus limit the degree to which roll 29 may approach 'roll 2li.A Y The surfaces 2I and 21 upon rolls 29 and 26 Y respectively, terminate short ofthe ends 4of the- `each end of the surface presence. of the usual coating'material as has` been hereinbefore described with respect to dams 9 and-f0.; Y Y` The rolls .20 and I illustrated in Fig. ls contemplated with 29 correspond to rolls I and respect tn rolls '4 and 5, that 1 and a similar arrangement.Y

-ance between the surfaces of `rolls 2u and 26 member is carriedl by a standard or bracket 44 which is rigidly aixed toframe 39.

The rolls- II, I2, I3 and I4 during rotation. as has been hereinbefore described, are' axially reciprocable whereby the coating material carried upon rolls 2 and 3 is rendered smooth and oi even thickness. It is Vto be understood, of course, that the means for reciprocating the roll I 3' forms no part, per se, of our invention and that said rolls II, I2, I3 and I4 may be reciprocated axially by anyconventional roll reciprocating means.

We claim as our invention:

1. A device for coating a paper web which comprises-a rotating coating roll, means for controllably passing' coating material in predeter mined'amount to the surface of said'r'oll in the form of a film, an axially reciprocating roll disposed adjacent said coating roll -and rotatable therewith with its surface in contact with the coating material upon the coating roll and positioned with respect to the coating roll to contact and, smooth said coating -material'thereon after application thereto'and render the film uniform in thickness before transfer to the web, and means for passing a paper web into contact with thelm of coating material onv the coating roll to transfer said'lilm to the surface of the web.

2. A device for coating a paper web which comprises a rotating coating roll, ,means'for con- .trollably passing Vcoating material in predetermined amount to the surface-of the'said roll in the form of a iilm,meansfor passing. a papel` web into contact with the film of coating material on the coating roll 'to transfer said film to thesurface ofthe web, andan axially reciprovis transferred to the web.

3. A device for coating a paper', web which comprises a rotating coating roll', means for controllably passing coating material in predetermined amount to the surface of the said roll in the form of a film, means for passing a paper web into contact with the film of coating material on the material upon thecoating roll to smooth said c coating material and render the coating film uniform in thickness, said reciprocating rolls being so positioned with respect to the coating roll as to contact the lm thereon after said film has been 5. A device for coating, a paper web which comprises a rotating coating roll, means for controllably passing coatingmaterial in predeterc mined amountr to the surface of said roll in the form of a film, comprisinga pair of juxtaposed gate rolls adapted to carry a quantity of coating material in their nip, means for rotating said gate rolls, a transfer roll disposed between said gate rolls and said coating roll, said transfer roll being in contact with said coating roll and one of said gate rolls to transfer coating material from said gate roll to the coating roll, an axially reciprocating` roll disposed adjacent said coating roll and rotatable therewith with its surface in contact with the coating material upon the coating roll to smooth said coating material and render the film uniform in thickness, and means for passing a paper web into contact withthe lm of coating material on the coating roll to transfer said fllm to the surface of the web, said reciprocating roll being so positioned with respect to the coating roll as to contact the lm thereon after said lm has been applied theref to and before the fllm is transferred to the web.

applied to said coating roll andbefore the lrn is transferred to the web.

4. A device for coating a paper web which comprises a rotating coating roll, means for conaxially reciprocating roll disposed adjacent said coating roll and rotatable therewith with its surface in contact with the coating material upon the coating roll to smooth said coating material and render the film uniform in thickness, and means for passing a paper web into contact with the lm of coating material on the coating roll to transfer said lm to the surface of the web, said reciprocating roll being so positionedwith respect to the coating roll as to contact the film thereon after said nlm has been applied thereto andl before the lm is transferred to the web.

6. A device for coating both surfaces of a continuously passing paper web which comprises,

a pair of juxtaposed rotating coating rolls, means for controllably passing coatingl material in predetermined amount to the surface of each of said coating rolls in the formy of a film, an axially reciprocating roll vdisposed adjacent each of said coating rolls and rotatable therewith with its surface in contact with the coating materialupon the respective coating roll to smooth said coating material and render the'fllms on each coating roll uniform in thicknessL and means for passing a paper web into contact with the films of coating material on the,coating rolls to transfer said films to the surfaces of the web, said reciprocating rolls being so positioned with respect to the coating as to contact the film thereon after said nlm has been applied to said coating roll and 4 before the film is transferred to the web.

WILLIAM F. THIELE. WARREN E. BEADLE, Jaz, Administrator of the Estate of Warren E. Beadle,

Sr., Deceased. 

